R205

Sample ID R205 • Cabinet B

obsidian

95cm W x 66.4cm H x 66.7cm D • 400g
Sample TypeRockRock QualityIgneousRock TypeExtrusive
CompositionFelsicTextureGlassyColor Index
Clast SizeAcid ReactionMohs Hardness 6

thick wedge shaped chunk with a very sharp edge. top is very smooth and has concentric rings from being chipped off.